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LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Robo Raider

Checking

2151 Robo Raider

131 pieces in 64 part and color combinations, plus 1 minifigure.

LEGO counts 136 pieces. This inventory comes from a separate parts catalog and lists 137, including the 6 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

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Piece checklist

Bricks Sloped 22 pieces

  • Brick Sloped 33° 3 x 2 Black Part 3298 Element 329826 ×1
  • Brick Sloped 33° 3 x 2 with RoboForce Blue and Gold Mechanical Foot Print Black Part 3298pr0048 ×2
  • Brick Sloped 33° 3 x 2 with RoboForce Gold 'ROBO' and Blue and Yellow Circuitry Print Black Part 3298pr0034 Element 4109742 ×2
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×3
  • Brick Sloped 45° 2 x 2 with RoboForce Gold and Red Display and Circuitry Print Black Part 3039pr9981 ×1
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Gray Part 3040b Element 4121933 or 304002 ×2
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Light Gray Part 3747a Element 4109695 ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Light Gray Part 3660 Element 366002 ×4

Hinges, Arms and Turntables 16 pieces

  • Arm Grab Jaw Black Part 4221 Element 422126 ×2
  • Arm Piece with Pin, 2 Fingers Black Part 6048a Element 604826 ×2
  • Arm Piece with Pin, 3 Fingers Black Part 6217 Element 4107590 or 4101774 ×1
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×1
  • Arm Grab Jaw Holder, 3 Fingers Light Gray Part 4220 Element 4114366 or 4109693 ×1
  • Arm Piece Straight with 2 and 3 Fingers Light Gray Part 3612 Element 4109694 or 610102 ×6
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Arm Piece 90° Turn [2 / 3 Fingers] Trans-Neon Orange Part 412 Element 3001547 ×2

Plates 16 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×2
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×1
  • Plate 2 x 2 Corner Blue Part 2420 Element 242073 or 242023 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×2
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×2

Plates Special 12 pieces

  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×3
  • Plate Special 1 x 4 Offset with Bar Holes Black Part 4590 Element 6002559 or 4278029 ×1
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×1
  • Plate Special 2 x 2 with Pin on Bottom Blue Part 2476a Element 4237078 or 4170321 ×2
  • Bracket 3 x 2 - 2 x 2 [aka Space Seat] Light Gray Part 4598 Element 4107108 or 459802 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Light Gray Part 4081b Element 408102 ×2

Plates Round Curved and Dishes 11 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Neon Orange Part 4740 Element 6245295 or 3006347 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Orange Part 6141 Element 6240218 or 3005747 1 spare in the box ×9

Bricks 9 pieces

  • Brick 1 x 3 Black Part 3622 Element 362226 ×2
  • Brick 2 x 4 Black Part 3001 Element 300126 ×2
  • Brick 2 x 2 Corner Light Gray Part 2357 Element 235752 or 235702 ×4
  • Brick 2 x 4 Light Gray Part 3001 Element 4116259 or 300102 ×1

Tiles Special 9 pieces

  • Tile Special 2 x 2 with Top Pin Light Gray Part 2460 Element 246002 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Neon Orange Part 2412b Element 6250159 or 6124829 ×5

Bricks Round and Cones 8 pieces

  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×2
  • Brick Round 1 x 1 Open Stud Light Gray Part 3062b Element 306202 ×6

Bricks Special 6 pieces

  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×2
  • Brick Special 1 x 1 with Headlight Light Gray Part 4070 Element 407002 ×2
  • Brick Special 1 x 2 with Grille Light Gray Part 2877 Element 287702 ×2

Panels 4 pieces

  • Panel 3 x 5 Solar / Deltoid with Clip [Hexagonal] Black Part 30034 Element 4107112 ×4

Plates Wedged 4 pieces

  • Wedge Plate 3 x 6 Cut Corners Black Part 2419 Element 241926 ×2
  • Wedge Plate 8 x 4 Wing Left Black Part 3933 Element 4189089 or 393326 ×1
  • Wedge Plate 8 x 4 Wing Right with Stud Notch Black Part 3934 Element 4189090 or 393426 ×1

Technic Beams 4 pieces

  • Technic Beam 1 x 5 Thin Black Part 32017 Element 6114935 or 4503423 ×2
  • Technic Beam 1 x 5 Thin Light Gray Part 32017 Element 4106885 ×2

Bars, Ladders and Fences 2 pieces

  • Lever Small Base with Light Gray Lever Black Part 298c03 Element 73667 1 spare in the box ×2

Containers 2 pieces

  • Box 2 x 2 x 2 [Hollow Studs] Light Gray Part 4345b Element 434502 ×1
  • Box 2 x 2 x 2 Door with Slot Trans-Neon Orange Part 4346 Element 3005947 ×1

Technic Bricks 2 pieces

  • Technic Slope Short (Wing Front) Black Part 2743 Element 6143851 or 4227262 ×2

Minifig Shields, Weapons, & Tools 1 piece

  • Tool Chainsaw Blade Trans-Neon Orange Part 6117 Element 611747 ×1

Technic Connectors 1 piece

  • Technic Axle and Pin Connector Angled #2 - 180° Light Gray Part 32034 Element 4107830 ×1

Tiles 1 piece

  • Tile 1 x 2 with Robo Gold, Yellow, Red Print Black Part 3069bpr0104 Element 4109744 ×1

Transportation - Sea and Air 1 piece

  • Engine Centre - Smooth Large Light Gray Part 4869 Element 4188629 or 486902 ×1

Minifigures 1 figure

  • RoboForce, Red with Plain Legs Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

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